View
13
Download
0
Category
Preview:
Citation preview
Brainstem
Non-cranial nerve nuclei Nucleus Site
Gracile nucleus Medulla (underneath gracile tubercle)
Cuneate nucleus Medulla (underneath cuneate tubercle)
Infeiro olivary nucleus Medulla
Pontine nucleus pons
inferior colliculus Midbrain
superior colliculus Midbrain
Red nucleus Midbrain
Substantia nigra Midbrain
Pretectal area Midbrain
Gracile nucleus
Cuneate nucleus
Internal arcuate fiber
Decussation of medial lemniscus
Non-cranial nerve nuclei in medulla oblongata
Inferior olivary nucleus
Pontine nucleus
Non-cranial nerve nuclei in pons
Nucleus of inferior colliculus
Non-cranial nerve nuclei in midbrain
superior colliculus
Red nucleus
Substantia nigra
Degeneration of the substantia nigra can result in Parkinson’s disease
Pretectal area
The junction of midbrain and diencephalon
The efferent fibers project to the bilateral accessory
nucleus of oculomotor nerve, involving both direct and
indirect light reflex of eye.
White matter
Ascending tracts
• Medial lemniscus
• Spinal lemniscus
• Trigeminal lemniscus
• Lateral lemniscus
Medial lemniscus
Conduct the
proprioceptive and
fine touch of the
contralateral trunk
and limbs
Ventral
posterolateral
nucleus
Spinothalamic lemniscus (tract)
Transfers the pain,
temperature and
rough touch-
pressure
sensation of the
contralateral trunk
and limbs
Ventral posteromedial
nucleus of thalamus Trigeminal lemniscus
(trigeminothalamic tract)
Trigeminal ganglia
Conduct the pain, temperature and touch-
pressure sensation from the skin,teeth and
mucous membrane of contralateral head and face
Lateral lemniscus
From bilatral cochlear
nuclei and superior
olivary nuclei
Conducts the auditory
sensation of both ears
Terminated to the nucleus
of inferior colliculus or
the medial genticulate
body
Descending tracts
• Pyramid tract:
Corticospinal tract (to spinal cord)
Corticobulbar tract (to brainstem)
• Rubrospinal tract
• Tectospinal tract
• Vestibulospinal tract
• Reticulospinal tract
Corticospinal tract
Corticobulbar tract
Nucleus of Oculomotor n.
Nucleus of trochlear
Motor nucleus of trigeminal n.
Nucleus of facial n.
Nucleus of ambiguus n.
Nucleus of accessory n.
Nucleus of hypoglossal n.
Nucleus of abducent n.
Corticonuclear tract
Upper
lower
Innervate bilateral general
somatic motor nuclei and
special visceral motor nuclei
Lower part of the
nucleus of facial nerve
and nucleus of
hypoglossal nerve only
receive the fibers of
contralateral corticobulnar
tract.
Reticular formation of brain stem
• Ascending reticular activating system (ARAS)
• Motor central and vital centres – Cardiovascular center
and respiratory center
• Serotonergic rapheal nuclei
Gracile nucleus
Cuneate nucleus
Internal arcuate fiber
Decussation of medial
lemniscus
pyramidal tract Hypoglossal n.
Spinal nucleus of
trigeminal n. 请在此放置您的文字
Dorsal nucleus of
vagus n.
Nucleus of
hypoglossal n.
Nucleus of ambiguus
Nucleus of solitary tract
Transverse section through decussation of medial lemniscus
Necleus of hypoglossal n.
Dorsal nucleus of vagus n.
Nucleus of
vestibular
Nucleus of
solitary tract
pyramid
Medial lemniscus
Nucleus of ambiguus
Inferior cerebella
peduncle
Hypoglossal n.
Inferior olivary nucleus
Spinal nucleus
of trigeminal n.
Transverse section through mid-olive level (medulla oblongata)
Spinal thalamic
tract
Pontine nucleus
Superior cerebella
peduncle
Pyramid tract
Nucleus of abducent n.
Nucleus of facial n.
Genu of facial n.
Spinal nucleus
of trigeminal n
Medial lamniscus
& trapeziod body
Lateral lamniscus
Transverse section through facial colliculus (pons)
Accessory nuleus of oculomotor n.
Nucleus of oculomotor n.
Mesencephlic nucleus of
trigeminal n.
Medial lemniscus
Red nucleus
Pyramid tract
Frontal pontine tract
Parieto-occipito-
temporopontine
tract
Substential nigra
Transverse section through level of superior colliculus (midbrain)
Superior colliculus
Recommended